The Boeing 707 is an American long-range narrow-body airliner that was developed and produced by Boeing Commercial Airplanes, its first jetliner.

Developed from the Boeing 367-80, a prototype first flown in 1954, the initial 707-120 first flew on December 20, 1957.

Pan American World Airways began regular 707 service on October 26, 1958.

The airplane was built until 1979.

A quadjet, the 707 has a swept wing with podded engines. Its larger fuselage cross-section allowed six-abreast economy seating, retained in the later 720, 727, 737, and 757.

Although it was not the first commercial jetliner in service, the 707 was the first to be widespread and is often credited with beginning the Jet Age.

It dominated passenger air transport in the 1960s, and remained common through the 1970s, on domestic, transcontinental, and transatlantic flights, as well as cargo and military applications.

It established Boeing as a dominant airliner manufacturer with its 7x7 series.

The initial, 145-foot-long (44 m) 707-120 was powered by Pratt & Whitney JT3C turbojet engines.

The shortened long-range 707-138 and the more powerful 707-220 entered service in 1959.

The longer range, heavier 707-300/400 series have a larger wing and are stretched slightly by 8 feet (2.4 m).

Powered by Pratt & Whitney JT4A turbojets, the 707-320 entered service in 1959, and the 707-420 with Rolls-Royce Conway turbofans in 1960.

The 720, a lighter short-range variant, was also introduced in 1960.

Powered by Pratt & Whitney JT3D turbofans, the 707-120B debuted in 1961 and the 707-320B in 1962.

The 707-120B typically flew 137 passengers in two classes over 3,600 nmi (6,700 km), and could accommodate 174 in one class.

With 141 passengers in two classes, the 707-320/420 could fly 3,750 nmi (6,940 km) and the 707-320B up to 5,000 nmi (9,300 km).

The 707-320C convertible passenger-freighter model entered service in 1963, and passenger 707s have been converted to freighter configurations.

Military derivatives include the E-3 Sentry airborne reconnaissance aircraft and the C-137 Stratoliner VIP transport.

A total of 865 Boeing 707s were produced and delivered, not including 154 Boeing 720s.